JPH11231313A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH11231313A JPH11231313A JP10028710A JP2871098A JPH11231313A JP H11231313 A JPH11231313 A JP H11231313A JP 10028710 A JP10028710 A JP 10028710A JP 2871098 A JP2871098 A JP 2871098A JP H11231313 A JPH11231313 A JP H11231313A
- Authority
- JP
- Japan
- Prior art keywords
- light
- liquid crystal
- light source
- crystal display
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/003—Lens or lenticular sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133616—Front illuminating devices
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133618—Illuminating devices for ambient light
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶表示装置（Ｌ
ＣＤ：Liquid Crystal Display）に関し、特に、バック
ライトの消費電力を低減した液晶表示装置に関する。The present invention relates to a liquid crystal display (L).
The present invention relates to a liquid crystal display (CD), and more particularly, to a liquid crystal display device in which power consumption of a backlight is reduced.
【０００２】[0002]
【従来の技術】ＬＣＤは、透明な基板上に透明な電極を
形成した電極基板間に液晶を封入して構成される。液晶
は電気光学的に異方性を有しているので、電極間に所望
の電圧を印加して液晶に電界を形成することにより、液
晶は電界強度に従った光学特性を示す。この性質を利用
し、画素毎に異なる電圧を印加せしめる構成とすること
により、所望の輝度を呈した画素の集合体として、表示
画像が作成される。このようにＬＣＤは、電圧制御によ
り表示画像が作成され、小型、薄型、低消費電力などの
利点があり、ＯＡ機器、ＡＶ機器などの分野で実用化が
進んでいる。特に、携帯用として用いられる場合には、
屋外で使用することが多く、豊富な外光を利用して表示
画面の可視化を図ることで総消費電力を大幅に低減した
ものが開発されている。2. Description of the Related Art An LCD is constructed by sealing liquid crystal between electrode substrates having transparent electrodes formed on a transparent substrate. Since the liquid crystal has electro-optical anisotropy, by applying a desired voltage between the electrodes to form an electric field in the liquid crystal, the liquid crystal exhibits optical characteristics according to the electric field intensity. By utilizing this property and applying a different voltage to each pixel, a display image is created as an aggregate of pixels exhibiting a desired luminance. As described above, the LCD has a display image created by voltage control, has advantages such as small size, thin shape, and low power consumption, and has been put to practical use in fields such as OA equipment and AV equipment. In particular, when used for portable use,
It is often used outdoors, and a device has been developed in which the total power consumption is greatly reduced by visualizing the display screen using abundant external light.
【０００３】図４はこのようなＬＣＤの側断面図であ
る。（１０）はＬＣＤパネル、（１１）は導光板、（１
２）は拡散板、（１３）は反射板、（２０）は光源、
（３０）は集光レンズ、（４０）は、これらのユニット
を保持する筐体である。光源（２０）は、背後にリフレ
クタ（２１）を配した蛍光ランプ、導光板（１１）はア
クリル樹脂等が用いられる。拡散板（１２）及び反射板
（１３）は、各々導光板（１１）の前面及び背面を一体
的に拡散加工及び乱反射加工を施したものでも良い。こ
れら導光板（１１）、拡散板（１２）、反射板（１
３）、光源（２０）及び集光レンズ（３０）は、照光部
であるバックライトを構成している。集光レンズ（３
０）は、導光板（１１）と別体のレンズ、あるいは、導
光板（１１）と一体でレンズ加工されたものが用いられ
る。また、筐体（４０）には、採光用の窓（４１）が開
けられ、集光レンズ（３０）が外部へ覗くようになって
いる。FIG. 4 is a side sectional view of such an LCD. (10) is an LCD panel, (11) is a light guide plate, (1)
2) is a diffusion plate, (13) is a reflection plate, (20) is a light source,
(30) is a condenser lens, and (40) is a housing for holding these units. The light source (20) is a fluorescent lamp having a reflector (21) disposed behind, and the light guide plate (11) is made of an acrylic resin or the like. The diffusing plate (12) and the reflecting plate (13) may be formed by integrally subjecting the front surface and the back surface of the light guide plate (11) to diffusion processing and irregular reflection processing. The light guide plate (11), the diffusion plate (12), and the reflection plate (1)
3) The light source (20) and the condenser lens (30) constitute a backlight which is an illuminating unit. Condensing lens (3
For 0), a lens separate from the light guide plate (11), or a lens processed integrally with the light guide plate (11) is used. In addition, a window (41) for lighting is opened in the housing (40) so that the condenser lens (30) can be seen outside.
【０００４】光源（２０）から発せられた光、あるい
は、集光レンズ（３０）より採り入れられた光は、導光
板（１１）に伝えられ、拡散板（１２）にて拡散される
とともに、反射板（１３）で乱反射される。そして、拡
散板（１２）より均一な平面光としてＬＣＤパネル（１
０）へ照射される。ＬＣＤパネル（１０）は、自身で発
光することができず、このように背後より照光を行うこ
とにより、所望の透過率に制御され、認識可能な前段階
にされた表示画面が透過光の分布として可視化される。The light emitted from the light source (20) or the light taken in from the condenser lens (30) is transmitted to the light guide plate (11), diffused by the diffusion plate (12), and reflected. The light is irregularly reflected by the plate (13). Then, the LCD panel (1) is converted from the diffuser plate (12) into uniform planar light.
0). The LCD panel (10) cannot emit light by itself, and by illuminating from behind as described above, the display is controlled to have a desired transmittance, and the display screen that has been set to a recognizable pre-stage has a distribution of transmitted light. Is visualized as
【０００５】この構成では、晴れの屋外のような外光が
豊富な環境では、光源（２０）を消灯して、集光レンズ
（３０）からの光のみによって照光を行い、屋内等、外
光が不十分な状態下では、光源（２０）を点灯すること
で明るい表示画面を得るといった使い方が可能となる。
従って、消費電力の大きな光源（２０）を使用せず、Ｌ
ＣＤパネル（１０）の駆動電力のみとなるので、総消費
電力が低減される。In this configuration, in an environment where the outside light is abundant, such as a sunny outdoor place, the light source (20) is turned off and the light is illuminated only by the light from the condenser lens (30), and the outside light such as indoors is used. In a state where is insufficient, it is possible to use the light source (20) to obtain a bright display screen by turning on the light source (20).
Therefore, the light source (20) having large power consumption is not used, and L
Since only the driving power of the CD panel (10) is used, the total power consumption is reduced.
【０００６】図５は、反射型のＬＣＤの側断面図であ
る。（１１０）は反射型ＬＣＤであり、（１４０）は、
これを収納する筐体である。反射型ＬＣＤ（１１０）
は、液晶駆動用の電極の一方を反射電極とする、あるい
は、透過型のパネルの背後に反射面を設ける等により、
観察者側からの光を液晶にて変調し、これを再び観察者
側へ射出するものである。従って、外光を利用できるの
で、光源が不要となり、ＬＣＤパネル（１１０）の駆動
電力のみとなるので、消費電力を低減することができ
る。FIG. 5 is a side sectional view of a reflection type LCD. (110) is a reflective LCD, and (140) is
This is a housing for storing this. Reflective LCD (110)
By using one of the electrodes for driving the liquid crystal as a reflective electrode, or by providing a reflective surface behind a transmissive panel, etc.
The light from the observer side is modulated by the liquid crystal and emitted again to the observer side. Therefore, since external light can be used, a light source is not required, and only driving power for the LCD panel (110) is required, so that power consumption can be reduced.
【０００７】[0007]
【発明が解決しようとする課題】図４に示すＬＣＤで
は、集光レンズ（３０）及び光源（２０）より導入され
る光の主進行方向は、ＬＣＤパネル（１０）の平面と平
行な平面上に位置している。このため、光源（２０）よ
り発せられた光の多くは、導光板（１１）内部を平行に
進み、反対側に位置する集光レンズ（３０）部より外部
へ漏洩してしまう。集光レンズ（３０）より採り入れら
れた光もまた、導光板（１１）の内部を平行に進み、光
源（２０）のリフレクタにて反射されて、導光板（１
１）内部を逆に進み、再び集光レンズ（３０）より外部
に漏れる。即ち、拡散板（１２）及び反射板（１３）に
とらえられてＬＣＤパネル（１０）へ向かって照射され
る光量が減少し、光の利用効率が悪かった。In the LCD shown in FIG. 4, the main traveling direction of the light introduced from the condenser lens (30) and the light source (20) is on a plane parallel to the plane of the LCD panel (10). It is located in. For this reason, most of the light emitted from the light source (20) travels in parallel inside the light guide plate (11) and leaks outside from the condenser lens (30) located on the opposite side. The light taken in from the condenser lens (30) also travels in parallel inside the light guide plate (11), is reflected by the reflector of the light source (20), and is reflected by the light guide plate (1).
1) It travels in the opposite direction and leaks again from the condenser lens (30) to the outside. That is, the amount of light that is captured by the diffusion plate (12) and the reflection plate (13) and radiated toward the LCD panel (10) is reduced, and the light use efficiency is poor.
【０００８】このことは、たとえ光源（２０）と集光レ
ンズ（３０）とが異なる辺に位置していても同じであ
る。即ち、光源（２０）と集光レンズ（３０）とが同一
平面上にある限り、導光板（１１）内を反射しながら進
む光は、最終的に集光レンズ（３０）より漏れ出てしま
う。This is the same even if the light source (20) and the condenser lens (30) are located on different sides. That is, as long as the light source (20) and the condenser lens (30) are on the same plane, light traveling while reflecting inside the light guide plate (11) will eventually leak out of the condenser lens (30). .
【０００９】更に、この構成では、光源（２０）は、Ｌ
ＣＤ本体に装備されているので、晴れの屋外での使用に
おいて、光源（２０）を使うことが無い場合でも、常
時、光源（２０）を搭載した状態で持ち運ばなければな
らず、必要以上に、重くなっていた。また、図５に示す
反射型も、外光の豊富な環境下では、携帯に最適である
が、外光が少なくると、表示画面が暗くなり、見にくく
なる問題がある。Further, in this configuration, the light source (20)
Since it is equipped on the CD main body, it must always be carried with the light source (20) mounted even when the light source (20) is not used in sunny outdoor use. Was getting heavy. The reflection type shown in FIG. 5 is also suitable for carrying in an environment where the external light is abundant, but there is a problem that if the external light is small, the display screen becomes dark and it is difficult to see.
【００１０】[0010]
【課題を解決するための手段】本発明は、この課題を解
決するために成され、対向面に液晶駆動用の電極が形成
された一対の透明電極基板間に液晶が封入されてなる液
晶表示パネルと、この液晶表示パネルに光を照射する照
光部と、を有する液晶表示装置において、前記照光部
は、光が導入される導光部と、前記導光部に光を導入す
る光源部とを有し、前記光源部は、前記導光部を具備し
た前記照光部の本体より、着脱自在とされている構成で
ある。SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and a liquid crystal display in which liquid crystal is sealed between a pair of transparent electrode substrates having liquid crystal driving electrodes formed on opposing surfaces. In a liquid crystal display device including a panel and an illuminating unit that irradiates the liquid crystal display panel with light, the illuminating unit includes a light guide unit that introduces light, and a light source unit that introduces light into the light guide unit. And the light source unit is configured to be detachable from a main body of the illumination unit including the light guide unit.
【００１１】これにより、使用態様に合わせて、光源部
を装着した状態と、光源部を離脱した状態が自由に選択
できる。特に、前記導光部は、前記光源部が装着される
領域において、導光層が外部に露出されてなる集光部を
有し、この集光部より外光が採り入れられる構成であ
る。Thus, the state in which the light source unit is mounted and the state in which the light source unit is detached can be freely selected according to the usage mode. In particular, the light guide section has a light condensing section in which the light guide layer is exposed to the outside in a region where the light source section is mounted, and is configured such that external light is taken in from the light condensing section.
【００１２】これにより、外光の豊富な環境下での使用
においては、光源を取り外すことにより、装置が小型
化、軽量化される。また、対向面に液晶駆動用の電極が
形成された一対の透明電極基板間に液晶が封入されてな
る反射型液晶表示パネルと、この反射型液晶表示パネル
に光を照射する照光部と、を有する液晶表示装置におい
て、前記照光部は光源を有し、前記反射型液晶表示装置
の本体より、着脱自在とされている構成である。Thus, in use in an environment with abundant external light, by removing the light source, the device can be reduced in size and weight. Also, a reflective liquid crystal display panel in which liquid crystal is sealed between a pair of transparent electrode substrates having electrodes for driving liquid crystal formed on opposing surfaces, and an illuminating unit that irradiates light to the reflective liquid crystal display panel. In the liquid crystal display device, the illuminating unit has a light source, and is detachable from a main body of the reflection type liquid crystal display device.
【００１３】これにより、使用態様に合わせて、照光部
を装着した状態と、照光部を離脱した状態が自由に選択
できる。According to this, it is possible to freely select a state in which the illuminating section is mounted and a state in which the illuminating section is detached, according to the usage mode.
【００１４】[0014]
【発明の実施の形態】図１は、本発明の第１の実施の形
態にかかるＬＣＤの側断面図である。ＬＣＤパネル（１
０）、導光板（１１）、拡散板（１２）、反射板（１
３）、集光レンズ（３０）、これらのユニットを収納保
持する筐体（４０）、更に、本発明の光源部（５０）か
らなる。導光板（１１）はアクリル板等が用いられる。
集光レンズ（３０）は、導光板（１１）と別体のレン
ズ、あるいは、導光板（１１）と同じアクリル樹脂が、
長方形の一側面を有した部分円柱状に加工されたもので
ある。これら導光板（１１）、拡散板（１２）、反射板
（１３）及び集光レンズ（３０）は、照光部であるバッ
クライトを構成している。また、筐体（４０）には、採
光用の窓（４１）が開けられ、集光レンズ（３０）が外
部へ覗くようにされている。FIG. 1 is a side sectional view of an LCD according to a first embodiment of the present invention. LCD panel (1
0), light guide plate (11), diffusion plate (12), reflection plate (1)
3) a condenser lens (30), a housing (40) for housing and holding these units, and a light source unit (50) of the present invention. An acrylic plate or the like is used for the light guide plate (11).
The condenser lens (30) is made of a lens separate from the light guide plate (11) or the same acrylic resin as the light guide plate (11).
It is processed into a partially cylindrical shape having one side surface of a rectangle. The light guide plate (11), the diffusion plate (12), the reflection plate (13), and the condenser lens (30) constitute a backlight which is an illumination unit. Further, a window (41) for lighting is opened in the housing (40) so that the condenser lens (30) can be seen outside.
【００１５】また、ＬＣＤパネル（１０）としては、ポ
リシリコン等の多結晶半導体を用いた薄膜トランジスタ
を用いることにより、表示画素部分と、その周辺の駆動
回路を同一基板上に一体的に作り込んだドライバー内蔵
型を採用することが望ましい。これにより、ドライバー
ＩＣの外付けが不要となるので、表示画面の周囲の額縁
部が縮小され、いっそうの小型化、軽量化が達成される
ので、携帯用に最適なＬＣＤが得られる。Further, as the LCD panel (10), by using a thin film transistor using a polycrystalline semiconductor such as polysilicon, a display pixel portion and a peripheral drive circuit are integrally formed on the same substrate. It is desirable to use a built-in driver type. This eliminates the need for an external driver IC, so that the frame around the display screen is reduced, and further miniaturization and weight reduction are achieved, so that an optimal LCD for portable use is obtained.
【００１６】本発明では、ＬＣＤパネル（１０）及びバ
ックライトを筐体（４０）にて収納してなるＬＣＤ本体
に、光源部（５０）が着脱自在の構成となっている。内
部の光源（５１）は、点光源であるＬＥＤ、線状光源で
ある例陰極間、面光源である平面蛍光管等が用いられ
る。このような光源部（５０）は、本体筐体（４０）の
窓（４１）部分へ、マグネット、嵌合構造、鉤、留め構
造等により装着／離脱を行えるようになっている。即
ち、集光レンズ（３０）へキャップ状に装着できる。According to the present invention, the light source section (50) is detachable from the LCD main body in which the LCD panel (10) and the backlight are housed in the housing (40). As the internal light source (51), an LED which is a point light source, an inter-cathode which is a linear light source, a flat fluorescent tube which is a surface light source and the like are used. Such a light source unit (50) can be mounted / removed to / from a window (41) of the main body housing (40) by a magnet, a fitting structure, a hook, a fastening structure, or the like. That is, it can be mounted on the condenser lens (30) in a cap shape.
【００１７】図２は、光源部（５０）と集光レンズ（３
０）の拡大図である。光源部（５０）は、アクリル樹脂
等の導光部（５２）と、例えば蛍光ランプである光源
（５１）が反射板（５３）により包囲されている。導光
部（５２）は、集光レンズ（３０）に対応する部分が凹
面部（５４）とされており、集光レンズ（３０）に凸面
が合体されるようになっている。反射板（５３）は、凹
面部（５４）は除かれている。FIG. 2 shows a light source section (50) and a condenser lens (3).
It is an enlarged view of (0). The light source unit (50) includes a light guide unit (52) such as an acrylic resin and a light source (51), for example, a fluorescent lamp, surrounded by a reflector (53). The light guide portion (52) has a concave portion (54) at a portion corresponding to the condenser lens (30), and a convex surface is combined with the condenser lens (30). The concave portion (54) of the reflection plate (53) is omitted.
【００１８】図１に示す如く、光源部（５０）を本体筐
体（４０）に装着した状態では、図２において、光源部
（５０）側の凹面部（５４）に、本体側の集光レンズ
（３０）の凸面があてがわれる。この状態で、光源（５
１）を点灯することにより、光源（５１）より発せられ
た光は、導光部（５２）に導入され、これと一体にされ
光路を接続した集光レンズ（３０）、更には、導光板
（１１）へ導入される。この光は、拡散板（１２）及び
反射板（１３）を経て最終的にＬＣＤパネル（１０）へ
照射される。従って、照明の暗い屋内や天気の悪い屋外
等、外光の少ない環境下において使用することができ
る。この時、光源（５１）より導入された光が集光レン
ズ（３０）より漏れ出ることが無くされるので、光の利
用効率が高まり、明るい表示画面が得られる。As shown in FIG. 1, when the light source unit (50) is mounted on the main body housing (40), the light condensing unit (54) on the light source unit (50) side receives the light condensing light on the main body side in FIG. The convex surface of the lens (30) is applied. In this state, the light source (5
By turning on 1), the light emitted from the light source (51) is introduced into the light guide (52), and is integrated with the light collector (30) connected to the light path, and further, the light guide plate. Introduced to (11). This light is finally irradiated on the LCD panel (10) via the diffusion plate (12) and the reflection plate (13). Therefore, it can be used in an environment with little external light, such as indoors with dark lighting or outdoors with bad weather. At this time, the light introduced from the light source (51) is prevented from leaking out of the condenser lens (30), so that the light use efficiency is enhanced and a bright display screen is obtained.
【００１９】また、光源部（５０）を本体より離脱する
ことにより、集光レンズ（３０）が外部に顕れる。この
状態では、集光レンズ（３０）より採り入れられた外光
が、導光板（１１）に導入され、ＬＣＤパネル（１０）
へ照射される。従って、照明の明るい屋内や天気の良い
屋外等、外光の豊富な環境下における使用に適してい
る。この状態では、本体側の電源は、ＬＣＤパネル（１
０）を駆動するのみなので、消費電力が低い。また、光
源部（５０）を取り外すことで、小型、軽量化が達成さ
れる。このように、装置を明るい環境下で使用すること
があらかじめ分かっている場合は、光源部（５０）を始
めから取り外しておくことで、携帯に適した状態とされ
る。When the light source section (50) is detached from the main body, the condenser lens (30) appears to the outside. In this state, the external light taken in by the condenser lens (30) is introduced into the light guide plate (11), and the LCD panel (10)
Irradiated to Therefore, it is suitable for use in an environment with abundant external light, such as indoors with bright lighting or outdoors with good weather. In this state, the power supply on the main unit side is the LCD panel (1).
Since only 0) is driven, power consumption is low. Further, by removing the light source unit (50), a reduction in size and weight can be achieved. As described above, when it is known in advance that the apparatus is used in a bright environment, the light source unit (50) is removed from the beginning to make the apparatus suitable for carrying.
【００２０】更に、光源部（５０）に、光源（５１）専
用の電池を取り付ける構成とすることで、ＬＣＤ本体側
の駆動電源と別にすることができる。これにより、消費
電力の大きい光源部（５０）の電源を本体とは別に交換
することができ、結果的に、電源電池の寿命を長くし
て、電池の交換頻度を下げることができる。Further, by mounting a battery dedicated to the light source (51) on the light source section (50), the battery can be separated from the drive power source on the LCD main body side. As a result, the power source of the light source unit (50) that consumes a large amount of power can be replaced separately from the main body, and as a result, the life of the power battery can be prolonged and the frequency of battery replacement can be reduced.
【００２１】図３は、本発明の第２の実施の形態にかか
る反射型ＬＣＤの側断面図である。反射型ＬＣＤパネル
（１１０）、これを収納保持する筐体（１４０）、本発
明の照光部（１５０）を有している。本発明では、光を
発する照光部（１５０）が、ＬＣＤパネル（１１０）を
収納した本体筐体（１４０）に着脱自在にされている。
照光部は（１５０）は、蛍光ランプ、ＬＥＤ等の光源
（１５１）とアクリル樹脂等の導光部（１５２）、更
に、不図示の反射面からなる。この照光部（１５０）
は、マグネット、嵌合構造、鉤、留め構造等により、本
体筐体（１４０）の周縁部の観察者側に着脱自在の構造
となっている。FIG. 3 is a side sectional view of a reflective LCD according to a second embodiment of the present invention. It has a reflective LCD panel (110), a housing (140) for housing and holding it, and an illuminating unit (150) of the present invention. In the present invention, the illuminating section (150) for emitting light is detachably attached to the main body housing (140) containing the LCD panel (110).
The illumination unit (150) includes a light source (151) such as a fluorescent lamp or an LED, a light guide unit (152) such as an acrylic resin, and a reflection surface (not shown). This illumination part (150)
Has a structure that can be detachably attached to the observer side of the periphery of the main body casing (140) by a magnet, a fitting structure, a hook, a fastening structure, and the like.
【００２２】この構成で、外光が少ない環境下では、図
の如く、照光部（１５０）を本体筐体（１４０）に取り
付ける。光源（１５１）から発せられた光は、導光部
（１５２）を介して射出され、ＬＣＤパネル（１１０）
へ照射され、表示画面が認識可能となる。一方、外光が
豊富な環境下では、照光部（１５０）を取り外すこと
で、通常の反射型として用いられる。従って、第１の実
施の形態と同様、外光が豊富な環境下での使用に限定さ
れる場合は、始めから照光部（１５０）を取り外してお
くことで、携帯に適した小型、軽量化が実現される。ま
た、ＬＣＤパネル（１４０）の駆動用電源電池と照光部
（１５０）の電源電池とを別にすることで、電池交換の
頻度をさげることができる。With this configuration, in an environment with little external light, the illuminating section (150) is attached to the main body casing (140) as shown in the figure. The light emitted from the light source (151) is emitted through the light guide (152), and is emitted from the LCD panel (110).
And the display screen becomes recognizable. On the other hand, in an environment where the external light is abundant, the illumination unit (150) is removed to be used as a normal reflection type. Therefore, similarly to the first embodiment, when the use is limited to an environment with abundant external light, the illuminating unit (150) is removed from the beginning to reduce the size and weight suitable for carrying. Is realized. Further, by separately providing the power supply battery for driving the LCD panel (140) and the power supply battery for the illuminating section (150), the frequency of battery replacement can be reduced.
【００２３】[0023]
【発明の効果】以上の説明から明らかな如く、外部の光
を採り入れる集光部を備えた液晶表示装置、あるいは、
反射型の液晶表示装置において、光源を着脱自在にした
ことにより、外部の環境に応じ、最適な使用形態にする
ことができ、結果的に、消費電力の低減、小型、軽量化
が実現された。As is apparent from the above description, a liquid crystal display device provided with a condensing portion for taking in external light, or
In the reflection type liquid crystal display device, by making the light source detachable, it is possible to optimize the use form according to the external environment, and as a result, the power consumption is reduced, and the size and weight are reduced. .
【図１】本発明の第１の実施の形態にかかるＬＣＤの側
断面図である。FIG. 1 is a side sectional view of an LCD according to a first embodiment of the present invention.
【図２】本発明の第１の実施の形態にかかるＬＣＤの要
部断面図である。FIG. 2 is a cross-sectional view of a main part of the LCD according to the first embodiment of the present invention.
【図３】本発明の第２の実施の形態にかかるＬＣＤの側
断面図である。FIG. 3 is a side sectional view of an LCD according to a second embodiment of the present invention.
【図４】従来のＬＣＤの側断面図である。FIG. 4 is a side sectional view of a conventional LCD.
【図５】従来のＬＣＤの側断面図である。FIG. 5 is a side sectional view of a conventional LCD.
１０，１１０ ＬＣＤパネル １１ 導光板 １２ 拡散板 １３ 反射板 ３０ 集光レンズ ４０，１４０ 筐体 ５０ 光源部 ５１ 光源 ５２ 導光部 ５３ 反射面 １５０ 照光部 10, 110 LCD panel 11 Light guide plate 12 Diffusion plate 13 Reflector plate 30 Condensing lens 40, 140 Housing 50 Light source unit 51 Light source 52 Light guide unit 53 Reflection surface 150 Lighting unit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 清水 真 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Makoto Shimizu 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.
Claims (5)
なる一対の透明電極基板間に液晶が封入されてなる液晶
表示パネルと、この液晶表示パネルに光を照射する照光
部と、を有する液晶表示装置において、 前記照光部は、光が導入される導光部と、前記導光部に
光を導入する光源部とを有し、前記光源部は、前記導光
部を具備した前記照光部の本体より、着脱自在とされて
いることを特徴とする液晶表示装置。1. A liquid crystal display panel having liquid crystal sealed between a pair of transparent electrode substrates having electrodes for driving liquid crystal formed on opposing surfaces, and an illuminating unit for irradiating the liquid crystal display panel with light. In the liquid crystal display device, the illuminating unit has a light guiding unit into which light is introduced, and a light source unit to introduce light into the light guiding unit, and the light source unit includes the light guiding unit. A liquid crystal display device, which is detachable from a main body of an illuminating section.
領域を少なくとも除き反射面とされていることを特徴と
する請求項１記載の液晶表示装置。2. The liquid crystal display device according to claim 1, wherein the light guide section is a reflection surface except at least a region where the light source section is mounted.
領域において、導光層が外部に露出されてなる集光部を
有し、この集光部より外光を採り入ることを特徴とする
請求項２記載の液晶表示装置。3. The light guide section has a light condensing section in which a light guide layer is exposed to the outside in a region where the light source section is mounted, and external light is taken in from the light condensing section. 3. The liquid crystal display device according to claim 2, wherein:
の電源と別であることを特徴とする請求項１から請求項
３のいずれかに記載の液晶表示装置。4. The liquid crystal display device according to claim 1, wherein a power source of the light source is different from a power source of the liquid crystal display panel.
一対の透明電極基板間に液晶が封入されてなる反射型液
晶表示パネルと、この反射型液晶表示パネルに光を照射
する照光部と、を有する液晶表示装置において、 前記照光部は光源を有し、前記反射型液晶表示装置の本
体より、着脱自在とされていることを特徴とする液晶表
示装置。5. A reflective liquid crystal display panel in which liquid crystal is sealed between a pair of transparent electrode substrates having electrodes for driving liquid crystal formed on opposing surfaces, and an illuminating unit for irradiating the reflective liquid crystal display panel with light. Wherein the illuminating unit has a light source and is detachable from a main body of the reflection type liquid crystal display device.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02871098A JP3515355B2 (en) | 1998-02-10 | 1998-02-10 | Liquid crystal display |
| TW088101342A TW514756B (en) | 1998-02-10 | 1999-01-29 | Liquid crystal display device |
| US09/246,488 US6034750A (en) | 1998-02-10 | 1999-02-09 | Liquid crystal display having detachable light source |
| KR10-1999-0004764A KR100430346B1 (en) | 1998-02-10 | 1999-02-10 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02871098A JP3515355B2 (en) | 1998-02-10 | 1998-02-10 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11231313A true JPH11231313A (en) | 1999-08-27 |
| JP3515355B2 JP3515355B2 (en) | 2004-04-05 |
Family
ID=12256023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02871098A Expired - Fee Related JP3515355B2 (en) | 1998-02-10 | 1998-02-10 | Liquid crystal display |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6034750A (en) |
| JP (1) | JP3515355B2 (en) |
| KR (1) | KR100430346B1 (en) |
| TW (1) | TW514756B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009244855A (en) * | 2004-09-27 | 2009-10-22 | Idc Llc | System and method for illuminating interferometric modulator display |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6147724A (en) | 1997-04-04 | 2000-11-14 | Hitachi, Ltd. | Back light system for minimizing non display area of liquid crystal display device |
| JPH11119701A (en) * | 1997-10-13 | 1999-04-30 | Sanyo Electric Co Ltd | Back light |
| JP3545237B2 (en) * | 1998-02-19 | 2004-07-21 | 三洋電機株式会社 | Liquid crystal display device with light collecting mechanism |
| US6621520B1 (en) * | 1998-06-09 | 2003-09-16 | Pentax Corporation | Display unit of digital camera |
| JP4408467B2 (en) * | 1998-10-30 | 2010-02-03 | 富士フイルム株式会社 | Digital camera and operation control method thereof |
| KR100301458B1 (en) * | 1999-05-11 | 2001-09-26 | 구본준, 론 위라하디락사 | Reflective type liquid crystal display |
| JP2002025326A (en) * | 2000-07-13 | 2002-01-25 | Seiko Epson Corp | Light source device, lighting device, liquid crystal device, and electronic device |
| TW540553U (en) * | 2000-12-04 | 2003-07-01 | Chi Mei Optoelectronics Corp | Structure reinforced exterior frame for planar display device |
| KR100883098B1 (en) * | 2002-04-26 | 2009-02-11 | 삼성전자주식회사 | Back light assembly and liquid crystal display device using the same |
| EP1571719A1 (en) * | 2004-03-05 | 2005-09-07 | Siemens Aktiengesellschaft | A rechargeable battery and an electronic device |
| KR100652058B1 (en) * | 2004-06-30 | 2006-12-01 | 엘지.필립스 엘시디 주식회사 | Back light unit |
| US10073264B2 (en) | 2007-08-03 | 2018-09-11 | Lumus Ltd. | Substrate-guide optical device |
| JP4895158B2 (en) * | 2005-08-26 | 2012-03-14 | 国立大学法人東北大学 | LCD display |
| WO2008055385A1 (en) * | 2006-11-09 | 2008-05-15 | Chi Lin Technology Co., Ltd | A backlight module, an lcd and a notebook computer having the same, and a manufacture method thereof |
| US8149351B2 (en) * | 2008-12-08 | 2012-04-03 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled backlights for sunlight viewable displays |
| US20100177080A1 (en) * | 2009-01-13 | 2010-07-15 | Metrologic Instruments, Inc. | Electronic-ink signage device employing thermal packaging for outdoor weather applications |
| US8339542B2 (en) * | 2009-06-26 | 2012-12-25 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled N-stack and collapsible backlights for sunlight viewable displays |
| US8228463B2 (en) * | 2009-11-18 | 2012-07-24 | 3M Innovative Properties Company | Passive daylight-coupled backlight with turning film having prisms with chaos for sunlight viewable displays |
| US8384852B2 (en) | 2010-11-22 | 2013-02-26 | 3M Innovative Properties Company | Hybrid daylight-coupled backlights for sunlight viewable displays |
| CN103827572B (en) * | 2011-09-15 | 2017-02-15 | 三菱电机株式会社 | Light intensity distribution conversion element, planar light source device, and liquid crystal display device |
| FR3011941B1 (en) * | 2013-10-16 | 2016-01-01 | Gb Dev | METHOD FOR QUICKLY MANUFACTURING A LIGHT GUIDE, LIGHT GUIDE AND APPARATUS OBTAINED |
| IL232197B (en) | 2014-04-23 | 2018-04-30 | Lumus Ltd | Compact head-mounted display system |
| KR20160037318A (en) * | 2014-09-26 | 2016-04-06 | 삼성디스플레이 주식회사 | Display device and fabrication method of the same |
| KR20170068695A (en) * | 2015-12-09 | 2017-06-20 | 삼성디스플레이 주식회사 | Display device |
| KR102482528B1 (en) | 2016-10-09 | 2022-12-28 | 루머스 리미티드 | Aperture multiplier using a rectangular waveguide |
| KR20230084335A (en) | 2016-11-08 | 2023-06-12 | 루머스 리미티드 | Light-guide device with optical cutoff edge and corresponding production methods |
| US11243434B2 (en) | 2017-07-19 | 2022-02-08 | Lumus Ltd. | LCOS illumination via LOE |
| US20190170327A1 (en) * | 2017-12-03 | 2019-06-06 | Lumus Ltd. | Optical illuminator device |
| IL259518B2 (en) | 2018-05-22 | 2023-04-01 | Lumus Ltd | Optical system and method for improvement of light field uniformity |
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| EP3939246A4 (en) | 2019-03-12 | 2022-10-26 | Lumus Ltd. | Image projector |
| KR20240059655A (en) | 2019-12-08 | 2024-05-07 | 루머스 리미티드 | Optical systems with compact image projector |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61193487U (en) * | 1985-05-27 | 1986-12-02 | ||
| JPS61201076U (en) * | 1985-06-06 | 1986-12-16 | ||
| JPS6341182U (en) * | 1986-09-03 | 1988-03-17 | ||
| JPH0418301Y2 (en) * | 1987-10-01 | 1992-04-23 | ||
| US5828427A (en) * | 1990-06-11 | 1998-10-27 | Reveo, Inc. | Computer-based image display systems having direct and projection modes of viewing |
| JPH04287017A (en) * | 1991-03-18 | 1992-10-12 | Nec Corp | Liquid crystal display device |
| JPH0559428U (en) * | 1992-01-14 | 1993-08-06 | 松下電工株式会社 | Backlight display for office automation equipment |
| TW417035B (en) * | 1994-05-11 | 2001-01-01 | Sharp Kk | Lighting device and a liquid crystal display using such a device |
| JP3256625B2 (en) * | 1994-05-18 | 2002-02-12 | 三菱電機株式会社 | Liquid crystal display |
| FR2737313B1 (en) * | 1995-07-25 | 1997-08-22 | Sextant Avionique | LIQUID CRYSTAL VISUALIZATION SCREEN |
| JPH09304769A (en) * | 1996-05-16 | 1997-11-28 | Casio Comput Co Ltd | Liquid crystal display device |
-
1998
- 1998-02-10 JP JP02871098A patent/JP3515355B2/en not_active Expired - Fee Related
-
1999
- 1999-01-29 TW TW088101342A patent/TW514756B/en not_active IP Right Cessation
- 1999-02-09 US US09/246,488 patent/US6034750A/en not_active Expired - Fee Related
- 1999-02-10 KR KR10-1999-0004764A patent/KR100430346B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009244855A (en) * | 2004-09-27 | 2009-10-22 | Idc Llc | System and method for illuminating interferometric modulator display |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19990072571A (en) | 1999-09-27 |
| US6034750A (en) | 2000-03-07 |
| JP3515355B2 (en) | 2004-04-05 |
| KR100430346B1 (en) | 2004-05-06 |
| TW514756B (en) | 2002-12-21 |
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